By the way that theory in which gravity is not a force is already there called general theory of relativity in which gravity is considered as a distortion of space time in place of a force.
This is what general theory of relativity says i.e., if two geodesics are diverging then the curvature...
Garth, you are absolutely right ! I know it is diificult, but still I want to know if there is any way to check homogeneity. Yes of course theoretical considerations like Compernical principle etc., are there... l
We can probe the isotropy of the universe by observing the universe just from a single place. However, as I know, that is not true for homogeneity.
What type of expriments we can carry out on ground or spcae, for probing the homogeneity of the universe.
Yes, the universe can expand with superluminal speed. The following phd thesis is dedicated to this problem.
Fundamental Aspects of the Expansion of the Universe and Cosmic Horizons
http://arxiv.org/abs/astro-ph/0402278
Hi everybdoy: I think in this thread so far nobody has talked about the question that why we need the multiverse ?
Answer is to solve the fine tunning problem i.e., why the values of physical constants are what they are. Multiverse theory says that there are universes of all possible values...
I think due to enormus increase in publications , it is becoming diificult to find readers; so people are giving catchy titles to their papers. I am listing some of them below. I will keep putting more and more titles. I request you to help me in making this list long.
Does Smoothing Matter...
Hi,
Forget about the force. Ask Frank Wilczek (I have forgotten the reference but there is a good article written by him for physics today; check his webpage). He will say there is nothing called force. All four are interactions. Can you write an expression for force on the basis of the...
Dear Zz,
let me make clear that here my intention is not to attack any "well established theory".
If there are any non physicists in this forum then I just want to say them that with time our scientific theories are becoming more and more stronger and physics and for that matter any...
Science is a type of "belief" but it is not like relegious beliefs which cannot be challanged.
Most of the scentific beliefs are based on some reasons.
If you go through some scientific papers you can find the term "belief" there. For example one one may be saying: We believe that...
Dear friend this is my reply:
There is no harm in using the term "belief". We have a set of "beliefs" on the basis of our expriences or prejudices. Sometime it is really difficult to find out how much of our "belief" is based on facts and how much of it is based on prejudices. For example in...
Most of it is going above my head. I do not know what type of force you are talking about.
GR which is "the" theory of gravity so far which we have and it clearly syas that "gravity is the deformation of the geometrical structure of the space time by energy".
So where is the force you are...
Absolutely right !
These are the facts which we have to look at and learn lessons from our past and keep our eyes open for all options.
This is what I am pointing towards.